No one is home at these megamansions

If you dropped millions on a luxurious mansion you would probably never want to leave. But for the super-rich homeowner many times these mansions can be their third, fourth or even tenth home, leaving a surprising number of custom-designed palaces with absolutely no one home.

CNBC unlocks the mansion gates and scores you the ultimate VIP access to an exclusive world filled with unimaginable extravagance and enormous fortunes. "Secret Lives of the Super Rich" premiers on Tuesday, March 24 at 10 p.m. ET/PT.